mkdirp method
Implementation
@override
Future<SafDocumentFile> mkdirp(String uri, List<String> names) async {
final map = await methodChannel.invokeMapMethod<String, dynamic>(
'mkdirp',
{'uri': uri, 'names': names},
);
if (map == null) {
throw Exception('Failed to create directory: $uri');
}
return SafDocumentFile.fromMap(map);
}